Reports say that Wisdom, who joined the the Championship club in 2017, was visiting relatives in Toxteth, Liverpool, when the incident took place.
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“Andre Wisdom has been the victim of an unprovoked assault and robbery,” said a statement from Derby.
“He sustained injuries which resulted in him being admitted to hospital, where he is in a stable condition.
“Merseyside Police are investigating and the club will focus its efforts on supporting Andre and his family.”
Merseyside Police did not immediately respond to CNN Sport’s request for comment.
According to the Liverpool Echo newspaper, a Merseyside Police spokeswoman said “officers received reports that a 27-year-old man was walking to his car at around 4.30am when he was assaulted by four men wearing masks and armed with knives.”
Wisdom played in Derby’s 2-1 victory against Reading on Saturday.
He signed for the club from Liverpool after a series of loan spells and has made 20 appearances so far this season.
Derby fans have started a fundraising campaign for a flag to show their support for Wisdom at home games, which has so far raised £4,230 ($5,200).
Derby has an outside chance of making the Championship playoffs as the club seeks promotion to the English Premier League.
source: cnn.com